<!DOCTYPE html>
<html lang="en">
<head>
    <style>
        header{width: 1200px;
        margin: 0 auto;}
        header div{width: 135px;
        height: 135px;
        border: 2px solid black;
        margin-left:  20px;
       float: left;
        }
       div:nth-child(1){background-image: url(icons.jpg);
  
       background-position: -0px -0px;
      }
          div:nth-child(2){background-image: url(icons.jpg);
  
       background-position: -150px -5px;
      }
        div:nth-child(3){background-image: url(icons.jpg);
  
       background-position: -150px -295px;
      }
        div:nth-child(4){background-image: url(icons.jpg);
  
       background-position: -295px -295px;
      }
        div:nth-child(5){background-image: url(icons.jpg);
  
       /*background-position: -440px -440px;*/
       background-origin: 0 0;
      }
    </style>
    <meta charset="UTF-8">
    <title>lianxi</title>
</head>
<body>
    <header>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
    </header>
</body>
</html>